Validation of the Monte Carlo Criticality Program KENO V. a for highly-enriched uranium systems
Abstract
A series of calculations based on critical experiments have been performed using the KENO V.a Monte Carlo Criticality Program for the purpose of validating KENO V.a for use in evaluating Y-12 Plant criticality problems. The experiments were reflected and unreflected systems of single units and arrays containing highly enriched uranium metal or uranium compounds. Various geometrical shapes were used in the experiments. The SCALE control module CSAS25 with the 27-group ENDF/B-4 cross-section library was used to perform the calculations. Some of the experiments were also calculated using the 16-group Hansen-Roach Library. Results are presented in a series of tables and discussed. Results show that the criteria established for the safe application of the KENO IV program may also be used for KENO V.a results.
- Authors:
- Publication Date:
- Research Org.:
- Oak Ridge National Lab., TN (USA)
- OSTI Identifier:
- 6210226
- Report Number(s):
- ORNL/CSD/TM-221
ON: DE85004325
- DOE Contract Number:
- AC05-84OR21400
- Resource Type:
- Technical Report
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; CRITICALITY; MONTE CARLO METHOD; Y-12 PLANT; HIGHLY ENRICHED URANIUM; VALIDATION; ACTINIDES; ELEMENTS; ENRICHED URANIUM; ISOTOPE ENRICHED MATERIALS; MATERIALS; METALS; NATIONAL ORGANIZATIONS; TESTING; URANIUM; US AEC; US DOE; US ERDA; US ORGANIZATIONS; 420203* - Engineering- Handling Equipment & Procedures
Citation Formats
Knight, J.R. Validation of the Monte Carlo Criticality Program KENO V. a for highly-enriched uranium systems. United States: N. p., 1984.
Web. doi:10.2172/6210226.
Knight, J.R. Validation of the Monte Carlo Criticality Program KENO V. a for highly-enriched uranium systems. United States. doi:10.2172/6210226.
Knight, J.R. Thu .
"Validation of the Monte Carlo Criticality Program KENO V. a for highly-enriched uranium systems". United States.
doi:10.2172/6210226. https://www.osti.gov/servlets/purl/6210226.
@article{osti_6210226,
title = {Validation of the Monte Carlo Criticality Program KENO V. a for highly-enriched uranium systems},
author = {Knight, J.R.},
abstractNote = {A series of calculations based on critical experiments have been performed using the KENO V.a Monte Carlo Criticality Program for the purpose of validating KENO V.a for use in evaluating Y-12 Plant criticality problems. The experiments were reflected and unreflected systems of single units and arrays containing highly enriched uranium metal or uranium compounds. Various geometrical shapes were used in the experiments. The SCALE control module CSAS25 with the 27-group ENDF/B-4 cross-section library was used to perform the calculations. Some of the experiments were also calculated using the 16-group Hansen-Roach Library. Results are presented in a series of tables and discussed. Results show that the criteria established for the safe application of the KENO IV program may also be used for KENO V.a results.},
doi = {10.2172/6210226},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Nov 01 00:00:00 EST 1984},
month = {Thu Nov 01 00:00:00 EST 1984}
}
-
Validation of the Monte Carlo criticality code, KENO IV, and the Hansen-Roach sixteen-energy-group cross sections was accomplished by calculating the effective neutron multiplication constant, k/sub eff/, of 29 experimentally critical assemblies which had uranium enrichments of 92.6% or higher in the uranium-235 isotope. The experiments were chosen so that a large variety of geometries and of neutron energy spectra were covered. Problems, calculating the k/sub eff/ of systems with high-uranium-concentration uranyl nitrate solution that were minimally reflected or unreflected, resulted in the separate examination of five cases.
-
Validation of KENO V. a. and two cross-section libraries for criticality calculations of low-enriched uranium systems
The SCALE code system, utilizing the Monte Carlo computer code KENO V.a, was employed to calculate 37 critical experiments. The critical assemblies had /sup 235/U enrichments of 5% or less and cover a variety of geometries and materials. Values of k/sub eff/ were calculated using two different results using either of the cross-section libraries. The 16-energy-group Hansen-Roach and the 27-energy-group ENDF/B-IV cross-section libraries, available in SCALE, were used in this validation study, and both give good results for the experiments considered. It is concluded that the code and cross sections are adequate for low-enriched uranium systems and that reliable criticalitymore » -
KENO-IV/CG, the combinatorial geometry version of the KENO Monte Carlo criticality safety program
KENO-IV/CG was developed to merge the simple geometry input description utilized by combinatorial geometry with the repeating lattice feature of the original KENO geometry package. The result is a criticality code with the ability to model a complex system of repeating rectangular lattices inside a complicated three-dimensional geometry system. Furthermore, combinatorial geometry was modified to differentiate between combinatorial zones describing a particular KENO BOX to be repeated in a KENO array and those combinatorial zones describing geometry external to an array. This allows the user to maintain a simple coordinate system without any geometric conflict due to spatial overlap. Severalmore »